Ball mill steel balls are the medium for grinding materials in cement ball mill equipment. The friction and friction between steel balls and materials produce grinding and peeling effects. During the operation of the cement ball mill, whether the gradation of the grinding body steel balls is reasonable is related to the working efficiency of the equipment. Only by ensuring that various balls have a certain proportion can they be adapted to the particle size composition of the material being ground, and good grinding effects can be achieved. Reasonable selection of the gradation of steel balls in cement ball mills is an indispensable measure to improve the output and quality of cement ball mills. Let’s take a look at how to obtain a reasonable gradation of steel ball media in the grinding body of cement ball mills?

 Tips for adding steel balls to cement ball mill
The steel ball ratio of the cement ball mill depends on the effective length of your mill, whether it has a roller press, the size of the feed particles, the lining plate and structure used, the expected sieve residue fineness and ratio, how many chromium balls to use, Judgment based on factors such as speed and speed. After the cement ball mill is installed, the large and small gears of the cement ball mill need to be meshed, and the processing capacity must be gradually increased. After the cement ball mill has been running normally for two or three days, check the meshing of the large and small gears. When everything is normal, open the manhole cover of the cement ball mill for the second time. Add the remaining 20% ​​steel balls.
 Things to note when grading steel balls in cement ball mills
1. During the normal operation of the cement ball mill, the reasonable friction generated between steel balls, steel balls and ores, steel balls and cement ball mill linings will increase the wear, causing large balls to be ground into small balls, and medium balls to be ground into small balls. Therefore, under normal circumstances, there is no need to add small balls.
2. The steel balls in the cement ball mill are constantly worn during operation. In order to maintain the ball charge filling rate and the reasonable ratio of the balls, and maintain the stable operation of the cement ball mill, the balls must be replenished reasonably to compensate for the wear.
3. The weight of steel balls added is based on the quality of the steel balls. The quality of the steel balls determines the amount of ore added per ton. Using new wear-resistant steel balls. The addition of good quality steel balls is calculated based on the amount of ore processed per ton (that is, 0.8kg per ton of ore). Generally, steel balls are required to process one ton of ore (1kg-1.2kg).

 Basic principles of steel ball gradation for cement ball mills
1. To handle ores with large hardness and coarse particle size, a larger impact force is required, and larger steel balls need to be loaded. That is, the harder the material is, the larger the diameter of the steel ball will be;
2. The larger the diameter of the mill, the greater the impact force. Choose a steel ball with a smaller diameter;
3. If a double-compartment partition is used, the ball diameter should be smaller than that of a single-layer partition with the same discharge section;
4. Generally, there are four levels of balls, with fewer big and small balls and a larger ball in the middle, that is, "less at the two ends and more in the middle."
 Factors to consider when mixing steel balls in cement ball mills
1. Equipment model, such as cylinder diameter and length;
2. Production requirements, that is, the user’s standard for grinding fineness of materials;
3. Material properties refer to the initial particle size, hardness and toughness of the material to be ground;
4. Specification size. Pay attention to the size and size, and do not blindly pursue large specifications.
In short, the proportion of steel balls in cement ball mill is a relatively complex technical issue. Each mineral processing plant must carefully analyze its own actual situation, and through long-term research and accumulation, it can find the ball filling ratio that suits it. In addition, the steel ball ratio also includes the ball diameter and quantity. The ratio is determined based on all the information. It must be just right. One point more is not enough, and one point less is not enough.